apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-web
spec:
  replicas: 10
  selector:
    matchLabels:
      app: nginx-web
  template:
    metadata:
      labels:
        app: nginx-web
      annotations:
        # Require dedicated ENI per pod
        vpc.cni.amazonaws.com/network-mode: "IPV4"
        vpc.cni.amazonaws.com/eniMode: "per-pod"      # One ENI per pod
        vpc.cni.amazonaws.com/eniPrefixMode: "GLOBAL"  # Prefix mode for efficiency
    spec:
      initContainers:
        - name: unique-index
          image: busybox:1.35
          command: ['sh', '-c']
          args:
            - |
              echo "<h1>Web Server $(POD_NAME)</h1><p>Deployed at $(date)</p>" > /usr/share/nginx/html/index.html
          env:
            - name: POD_NAME
              valueFrom:
                fieldRef:
                  fieldPath: metadata.name
          volumeMounts:
            - name: nginx-html
              mountPath: /usr/share/nginx/html
      containers:
        - name: nginx
          image: nginx:1.27-alpine
          ports:
            - containerPort: 80
          volumeMounts:
            - name: nginx-html
              mountPath: /usr/share/nginx/html
              readOnly: true
      volumes:
        - name: nginx-html
          emptyDir: {}
---
apiVersion: v1
kind: Service
metadata:
  name: nginx-service
spec:
  selector:
    app: nginx-web
  ports:
    - port: 80
      targetPort: 80
  type: ClusterIP